InChI=1S/C20H30O2/c1-17(2)8-5-9-18(3)10-6-11-19(4)12-7-13-20(16-22)14-15-21/h8,10,12,14-16H,5-7,9,11,13H2,1-4H3/b18-10+,19-12+,20-14+